Your credentials are stored securely on the server in a local file, never in the browser.
All API calls are made server-side.
Meta Platforms (Facebook · Instagram · Threads)
One app covers all three — developers.facebook.com
Graph API Explorer → Generate Page Access Token (long-lived)
Create app at reddit.com/prefs/apps → "script" type
TikTok
developers.tiktok.com → Content Posting API
Note: TikTok's Content Posting API requires developer approval. Video or image required.